Similarity criterion of flight control law parameters for scaled-model of supersonic aircraft

Shang TAI; Lixin WANG; Yanguo HU; Haoze WU; Kai HUANG; Hailiang LIU; Ting YUE

doi:10.7527/S1000-6893.2025.31885

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2025 , Vol. 46 >Issue 20: 531885 - 531885

DOI: https://doi.org/10.7527/S1000-6893.2025.31885

Special Issue: Key Technologies for Supersonic Civil Aircraft

Similarity criterion of flight control law parameters for scaled-model of supersonic aircraft

Shang TAI ,
Lixin WANG ,
Yanguo HU ,
Haoze WU ,
Kai HUANG ,
Hailiang LIU ,
Ting YUE

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^1.School of Aeronautic Science and Engineering，Beihang University，Beijing 100191，China
^2.AVIC Shenyang Aircraft Design and Research Institute，Shenyang 110035，China

E-mail： yueting_buaa@126.com

Received date: 2025-02-24

Revised date: 2025-03-18

Accepted date: 2025-04-01

Online published: 2025-04-07

Supported by

Aeronautical Science Foundation of China(20240049051001)

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Abstract

During the conceptual design phase of an aircraft， flight tests of scaled-model are often used to approximate the motion of full-size aircraft and validate the rationality of the design. Only similar design criteria have been investigated for scaled-model in the low-speed flight phase， however， no research has been carried out on similar design of overall parameters and flight control law parameters for supersonic aircraft. To conduct the flight test of high-gain supersonic aircraft with linear flight control law， it is necessary to systematically investigate the similarity of the overall parameters and flight control law parameters between the scaled-model and the full-size aircraft. First， the similarity criterions for the ontological parameters and the kinematic parameters of the scaled-model are derived based on the heavy model method. Second， the general similarity relationships applicable to all flight control law configurations and feedback signals are analyzed and derived. According to the differences in control principles， the flight control law parameters are categorized into two types： feedback gains and series dynamic links. For these two types of parameters， similar relations with generalization are derived based on similar system theory. Finally， the mathematical simulation of a closed-loop system with a control law is completed using a supersonic aircraft and its scaled- model as an example. The results show that the simulation results of the full-size aircraft and scaled-model with flight control laws satisfy the motion similarity relationship， validating the correctness of the research conclusions in this paper.

Key words： supersonic aircraft; similarity criterion; scaled-model; flight control law; flight simulation

Cite this article

Shang TAI , Lixin WANG , Yanguo HU , Haoze WU , Kai HUANG , Hailiang LIU , Ting YUE . Similarity criterion of flight control law parameters for scaled-model of supersonic aircraft[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(20) : 531885 -531885 . DOI: 10.7527/S1000-6893.2025.31885

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